Process of extracting metals from cyanid solutions.



No. 743,550. I PVATENTED NOV. 10,1903.

- J. A. OGDEN. PROCESS OF EXTRAGTING METALS FROM CY'AINID SOLUTIONS.

APPLICATION FILED AUG 6, 1902.

H0 MDDEL.

lime/dor- Patented November 10, 1903.

UNITED STATES PATENT OFFICE.

JAMES A. OGDEN, OF DEADWOOD, SOUTH DAKOTA, ASSIGNOR OF ONE- FOURTH TO S. W. RUSSELL, OF DEADWOOD, SOUTH DAKOTA.

PllOCESS EXTRACTlNG METALS FROM CYANID SOLUTIONS.

SPEGIFICATION forming part of Letters Patent No. '74=3,550, dated November 10, 1903.

Application filed August 6,1902. I Serial No. 118,656- (No specimens.)

, clare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, refer-.

once being had to the accompanying drawing, and to the letters of reference marked thereon, which forms a part of this specification.

My invention relates to improvements in processes of extracting gold, silver, or other metals from a cyanid' solution of the same; and it consists of mixing a cyanid solution containing metals with a metal, salts of a metal, or a compound of metals soluble in said cyanid solution in proper proportions, thoroughly agitating the mixture, and precipitating the same, as hereinafter set forth.

The drawing accompanying this specification and a part thereof represents an apparatus which may be employed in carrying out my invention.

In my improved process the amount of flow of the cyanid or primary solution, which is held in a tank A, may be controlled by means of a measuringglass G, which is in communication with the tank A by means of the pipe E and cook e and is provided with a discharge-pipe G, having a cock g. The primary solution is mixed with a secondary or precipitating solution having a metallic base soluble in said primary solution, and the amount or proportion of said solutions is determined by the effect in the operation of the same. The secondary or precipitating solution consists of a metal-such as barium; magnesium, lead, or mercury salts of a metal, or compound thereof soluble in a cyanid solution and is passed, as shown in the drawing, from its tank B through the pipe F into a measuring-glass D and then through the pipe H into a mixing vessel J, where it blades N thereon and provided with connected shaft Q and gearing for rotating the said blades.

While the device named may be employed in the foregoing steps in the process, yet I do not wish to be restricted in my process to such apparatus, as other and suitable devices may be employed. However, those shown are preferred, and the same are shown, described, and claimed in a copending application.

After thoroughly agitating the mixed solution in the barrel L or other receptacle the solution is run into a settling-tank W and allowed to settle, when the clear solution is drawn off and the precipitates dried, pressed,

and melted into bullion or the gold and silver separated by any well-known process before melting.

The clear solution may be fortified with a cyanid and reused.

By this process there is a shortening of the time in the precipitation of the metals and also a saving in the material over the old way of using zinc shavings or zinc flume;

Having thus described my invention, what I desire to claim and secure by Letters Patent is-- g The process of treatinggold, silver or other metals from a cyanid or primary solution, consisting in mixing in a -receptacle a given quantity of said primary solution with a given quantity of a secondary solution having. a metal base and capable of liberating the metals in said primary solution; leaving said mixture in said vessel until said liberation is partially efiected, then passing said mixture into a second receptacle and agitated therein In testimony whereof I have afiixed my signature in presence of two witnesses.

JAMES A. OGDEN.

Witnesses:

RAY D. HUBBARD, MILTON L. BALDY. 

